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5 March 2021 Plano-concave microresonator sensors for photoacoustic imaging: optical sensitivity maximization using transfer matrix model
David Martin-Sanchez, James A. Guggenheim, Edward Z. Zhang, Dylan M. Marques, Peter R. T. Munro, Paul C. Beard
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Proceedings Volume 11642, Photons Plus Ultrasound: Imaging and Sensing 2021; 116421X (2021) https://doi.org/10.1117/12.2580696
Event: SPIE BiOS, 2021, Online Only
Abstract
Deep tissue applications (>1 cm) for photoacoustic imaging are currently limited for traditional Fabry-Pérot ultrasound transducers interrogated by tightly focused Gaussian beams due to beam walk-off. We investigate the optical confinement of the beam using plano-concave microresonators with a model based on the ABCD formalism and the use of high-sensitive and high-density multi-element arrays. The results show an improvement in the sensitivity enabling an increase of the penetration depth in tomographic photoacoustic imaging.
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David Martin-Sanchez, James A. Guggenheim, Edward Z. Zhang, Dylan M. Marques, Peter R. T. Munro, and Paul C. Beard "Plano-concave microresonator sensors for photoacoustic imaging: optical sensitivity maximization using transfer matrix model", Proc. SPIE 11642, Photons Plus Ultrasound: Imaging and Sensing 2021, 116421X (5 March 2021); https://doi.org/10.1117/12.2580696
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KEYWORDS
Photoacoustic imaging
Sensors
Microresonators
Imaging arrays
Optical arrays
Gaussian beams
Tissue optics
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